Ink jet fluid system
US4329696A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1980 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Jul 23, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet fluid system includes a print head, defining a fluid reservoir, and further including at least one orifice communicating with the reservoir for generating a jet drop stream from the fluid flowing through the orifice. Inlet and outlet valves are connected to inlet and outlet openings of the print head, respectively, and a siphon line extending generally downward is connected to the outlet valve. A float valve, connected between the siphon line and the fluid supply system for the print head, vents the lower end of the siphon line to atmosphere to produce a sub-atmospheric fluid pressure within the print head after shutdown of the printer. The float valve includes a float which prevents air from entering the fluid supply through the valve. The float valve further is arranged so as to prevent ink within the valve from flowing out the vent opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.